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Finding the Fourth Proportional to 394.64, 591.15 and 199.37

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Solution

The fourth proportional to 394.64, 591.15 and 199.37 is: 298.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.64 : 591.15 = 199.37 : x
  2. Step 2: Convert to fraction form
    394.64/591.15 = 199.37/x
  3. Step 3: Cross multiply
    394.64x = 591.15 × 199.37
  4. Step 4: Simplify right side
    394.64x = 117,854.62
  5. Step 5: Solve for x
    x = 117,854.62/394.64
  6. Step 6: Final answer
    x = 298.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.